A steady current is flowing in a conductor of non-uniform cross-section. The charge passing through any cross-section per unit time is:
Correct answer: A. Directly proportional to the area of cross-section
- A. Directly proportional to the area of cross-section
- B. Proportional to square of the area of cross-section
- C. Inversely proportional to the area of cross-section
- D. lndependent of the area of cross-section
Explanation
The charge passing through any cross-section per unit time is current and is inversely proportionaly to resistance and hence is directly proportional to area of cross section.
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Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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